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[/] [or1k/] [trunk/] [linux/] [uClibc/] [include/] [dirent.h] - Blame information for rev 1765

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1 1325 phoenix
/* Copyright (C) 1991-1999, 2000 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, write to the Free
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   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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   02111-1307 USA.  */
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/*
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 *      POSIX Standard: 5.1.2 Directory Operations      <dirent.h>
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 */
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#ifndef _DIRENT_H
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#define _DIRENT_H       1
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#include <features.h>
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__BEGIN_DECLS
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#include <bits/types.h>
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#ifdef __USE_XOPEN
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# ifndef __ino_t_defined
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#  ifndef __USE_FILE_OFFSET64
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typedef __ino_t ino_t;
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#  else
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typedef __ino64_t ino_t;
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#  endif
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#  define __ino_t_defined
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# endif
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# if defined __USE_LARGEFILE64 && !defined __ino64_t_defined
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typedef __ino64_t ino64_t;
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#  define __ino64_t_defined
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# endif
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#endif
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/* This file defines `struct dirent'.
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   It defines the macro `_DIRENT_HAVE_D_NAMLEN' iff there is a `d_namlen'
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   member that gives the length of `d_name'.
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   It defines the macro `_DIRENT_HAVE_D_RECLEN' iff there is a `d_reclen'
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   member that gives the size of the entire directory entry.
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   It defines the macro `_DIRENT_HAVE_D_OFF' iff there is a `d_off'
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   member that gives the file offset of the next directory entry.
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   It defines the macro `_DIRENT_HAVE_D_TYPE' iff there is a `d_type'
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   member that gives the type of the file.
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 */
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#include <bits/dirent.h>
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#if (defined __USE_BSD || defined __USE_MISC) && !defined d_fileno
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# define d_ino  d_fileno                 /* Backward compatibility.  */
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#endif
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/* These macros extract size information from a `struct dirent *'.
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   They may evaluate their argument multiple times, so it must not
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   have side effects.  Each of these may involve a relatively costly
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   call to `strlen' on some systems, so these values should be cached.
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   _D_EXACT_NAMLEN (DP) returns the length of DP->d_name, not including
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   its terminating null character.
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   _D_ALLOC_NAMLEN (DP) returns a size at least (_D_EXACT_NAMLEN (DP) + 1);
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   that is, the allocation size needed to hold the DP->d_name string.
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   Use this macro when you don't need the exact length, just an upper bound.
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   This macro is less likely to require calling `strlen' than _D_EXACT_NAMLEN.
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   */
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#ifdef _DIRENT_HAVE_D_NAMLEN
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# define _D_EXACT_NAMLEN(d) ((d)->d_namlen)
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# define _D_ALLOC_NAMLEN(d) (_D_EXACT_NAMLEN (d) + 1)
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#else
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# define _D_EXACT_NAMLEN(d) (strlen ((d)->d_name))
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# ifdef _DIRENT_HAVE_D_RECLEN
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#  define _D_ALLOC_NAMLEN(d) (((char *) (d) + (d)->d_reclen) - &(d)->d_name[0])
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# else
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#  define _D_ALLOC_NAMLEN(d) (sizeof (d)->d_name > 1 ? sizeof (d)->d_name : \
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                              _D_EXACT_NAMLEN (d) + 1)
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# endif
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#endif
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#ifdef __USE_BSD
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/* File types for `d_type'.  */
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enum
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  {
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    DT_UNKNOWN = 0,
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# define DT_UNKNOWN     DT_UNKNOWN
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    DT_FIFO = 1,
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# define DT_FIFO        DT_FIFO
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    DT_CHR = 2,
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# define DT_CHR         DT_CHR
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    DT_DIR = 4,
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# define DT_DIR         DT_DIR
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    DT_BLK = 6,
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# define DT_BLK         DT_BLK
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    DT_REG = 8,
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# define DT_REG         DT_REG
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    DT_LNK = 10,
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# define DT_LNK         DT_LNK
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    DT_SOCK = 12,
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# define DT_SOCK        DT_SOCK
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    DT_WHT = 14
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# define DT_WHT         DT_WHT
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  };
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/* Convert between stat structure types and directory types.  */
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# define IFTODT(mode)   (((mode) & 0170000) >> 12)
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# define DTTOIF(dirtype)        ((dirtype) << 12)
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#endif
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/* This is the data type of directory stream objects.
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   The actual structure is opaque to users.  */
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typedef struct __dirstream DIR;
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/* Open a directory stream on NAME.
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   Return a DIR stream on the directory, or NULL if it could not be opened.  */
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extern DIR *opendir (__const char *__name) __THROW;
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/* Close the directory stream DIRP.
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   Return 0 if successful, -1 if not.  */
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extern int closedir (DIR *__dirp) __THROW;
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/* Read a directory entry from DIRP.  Return a pointer to a `struct
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   dirent' describing the entry, or NULL for EOF or error.  The
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   storage returned may be overwritten by a later readdir call on the
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   same DIR stream.
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   If the Large File Support API is selected we have to use the
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   appropriate interface.  */
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#ifndef __USE_FILE_OFFSET64
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extern struct dirent *readdir (DIR *__dirp) __THROW;
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#else
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# ifdef __REDIRECT
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extern struct dirent *__REDIRECT (readdir, (DIR *__dirp) __THROW, readdir64);
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# else
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#  define readdir readdir64
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# endif
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#endif
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#ifdef __USE_LARGEFILE64
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extern struct dirent64 *readdir64 (DIR *__dirp) __THROW;
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#endif
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#if defined __USE_POSIX || defined __USE_MISC
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/* Reentrant version of `readdir'.  Return in RESULT a pointer to the
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   next entry.  */
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# ifndef __USE_FILE_OFFSET64
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extern int readdir_r (DIR *__restrict __dirp,
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                      struct dirent *__restrict __entry,
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                      struct dirent **__restrict __result) __THROW;
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# else
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#  ifdef __REDIRECT
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extern int __REDIRECT (readdir_r,
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                       (DIR *__restrict __dirp,
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                        struct dirent *__restrict __entry,
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                        struct dirent **__restrict __result) __THROW,
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                       readdir64_r);
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#  else
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#   define readdir_r readdir64_r
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#  endif
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# endif
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178
# ifdef __USE_LARGEFILE64
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extern int readdir64_r (DIR *__restrict __dirp,
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                        struct dirent64 *__restrict __entry,
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                        struct dirent64 **__restrict __result) __THROW;
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# endif
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#endif  /* POSIX or misc */
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/* Rewind DIRP to the beginning of the directory.  */
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extern void rewinddir (DIR *__dirp) __THROW;
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188
#if defined __USE_BSD || defined __USE_MISC || defined __USE_XOPEN
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# include <bits/types.h>
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/* Seek to position POS on DIRP.  */
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extern void seekdir (DIR *__dirp, long int __pos) __THROW;
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/* Return the current position of DIRP.  */
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extern long int telldir (DIR *__dirp) __THROW;
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#endif
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198
#if defined __USE_BSD || defined __USE_MISC
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/* Return the file descriptor used by DIRP.  */
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extern int dirfd (DIR *__dirp) __THROW;
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# if defined __OPTIMIZE__ && defined _DIR_dirfd
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#  define dirfd(dirp)   _DIR_dirfd (dirp)
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# endif
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207
# ifndef MAXNAMLEN
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/* Get the definitions of the POSIX.1 limits.  */
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#  include <bits/posix1_lim.h>
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/* `MAXNAMLEN' is the BSD name for what POSIX calls `NAME_MAX'.  */
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#  ifdef NAME_MAX
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#   define MAXNAMLEN    NAME_MAX
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#  else
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#   define MAXNAMLEN    255
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#  endif
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# endif
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# define __need_size_t
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# include <stddef.h>
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/* Scan the directory DIR, calling SELECTOR on each directory entry.
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   Entries for which SELECT returns nonzero are individually malloc'd,
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   sorted using qsort with CMP, and collected in a malloc'd array in
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   *NAMELIST.  Returns the number of entries selected, or -1 on error.  */
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# ifndef __USE_FILE_OFFSET64
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extern int scandir (__const char *__restrict __dir,
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                    struct dirent ***__restrict __namelist,
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                    int (*__selector) (__const struct dirent *),
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                    int (*__cmp) (__const void *, __const void *)) __THROW;
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# else
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#  ifdef __REDIRECT
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extern int __REDIRECT (scandir,
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                       (__const char *__restrict __dir,
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                        struct dirent ***__restrict __namelist,
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                        int (*__selector) (__const struct dirent *),
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                        int (*__cmp) (__const void *, __const void *)) __THROW,
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                       scandir64);
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#  else
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#   define scandir scandir64
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#  endif
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# endif
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244
# if defined __USE_GNU && defined __USE_LARGEFILE64
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/* This function is like `scandir' but it uses the 64bit dirent structure.
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   Please note that the CMP function must now work with struct dirent64 **.  */
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extern int scandir64 (__const char *__restrict __dir,
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                      struct dirent64 ***__restrict __namelist,
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                      int (*__selector) (__const struct dirent64 *),
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                      int (*__cmp) (__const void *, __const void *)) __THROW;
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# endif
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253
/* Function to compare two `struct dirent's alphabetically.  */
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# ifndef __USE_FILE_OFFSET64
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extern int alphasort (__const void *__e1, __const void *__e2)
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     __THROW __attribute_pure__;
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# else
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#  ifdef __REDIRECT
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extern int __REDIRECT (alphasort,
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                       (__const void *__e1, __const void *__e2)
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                       __THROW,
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                       alphasort64) __attribute_pure__;
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#  else
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#   define alphasort alphasort64
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#  endif
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# endif
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268
# if defined __USE_GNU && defined __USE_LARGEFILE64
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extern int alphasort64 (__const void *__e1, __const void *__e2)
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     __THROW __attribute_pure__;
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# endif
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# ifdef __USE_GNU
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/* Function to compare two `struct dirent's by name & version.  */
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#  ifndef __USE_FILE_OFFSET64
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extern int versionsort (__const void *__e1, __const void *__e2)
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     __THROW __attribute_pure__;
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#  else
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#   ifdef __REDIRECT
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extern int __REDIRECT (versionsort,
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                       (__const void *__e1, __const void *__e2)
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                       __THROW,
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                       versionsort64) __attribute_pure__;
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#   else
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#    define versionsort versionsort64
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#   endif
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#  endif
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#  ifdef __USE_LARGEFILE64
290
extern int versionsort64 (__const void *__e1, __const void *__e2)
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     __THROW __attribute_pure__;
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#  endif
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# endif
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/* Read directory entries from FD into BUF, reading at most NBYTES.
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   Reading starts at offset *BASEP, and *BASEP is updated with the new
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   position after reading.  Returns the number of bytes read; zero when at
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   end of directory; or -1 for errors.  */
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# ifndef __USE_FILE_OFFSET64
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extern __ssize_t getdirentries (int __fd, char *__restrict __buf,
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                                size_t __nbytes,
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                                __off_t *__restrict __basep) __THROW;
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# else
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#  ifdef __REDIRECT
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extern __ssize_t __REDIRECT (getdirentries,
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                             (int __fd, char *__restrict __buf,
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                              size_t __nbytes,
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                              __off64_t *__restrict __basep) __THROW,
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                             getdirentries64);
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#  else
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#   define getdirentries getdirentries64
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#  endif
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# endif
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315
# ifdef __USE_LARGEFILE64
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extern __ssize_t getdirentries64 (int __fd, char *__restrict __buf,
317
                                  size_t __nbytes,
318
                                  __off64_t *__restrict __basep) __THROW;
319
# endif
320
 
321
#endif /* Use BSD or misc.  */
322
 
323
__END_DECLS
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#endif /* dirent.h  */

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